On the customer accounts that I worked on, Cisco's Advanced Services team built the GISOs (not me), so I am shooting in the dark here and am probably pointing out things you already know...
"XR7" is, unfortunately, a somewhat ambiguous term in that the XR marketing organization has used it to refer to both 7.x versions of eXR and LNT versions of 7.x. I am assuming you are referring to NCS540 SKUs that run XR7/LNT (ie, the "Big Bend" or "Darwin" SKUs). I am not sure if there are any public-facing docs that call out "LNT" as the version of XR7 that runs XR processes natively on linux (vs in an VM/LXC) and eliminates the "Calvados" admin VM/LXC, but the usage doc for gisobuild.py does provide special instructions for LNT builds (apologies if this was already obvious to you):
usage: gisobuild.py [-h] [--iso ISO] [--repo REPO [REPO ...]]
[--bridging-fixes BRIDGE_FIXES [BRIDGE_FIXES ...]]
[--xrconfig XRCONFIG] [--ztp-ini ZTP_INI] [--label LABEL]
[--no-label] [--out-directory OUT_DIRECTORY]
[--create-checksum] [--yamlfile CLI_YAML] [--clean]
[--pkglist PKGLIST [PKGLIST ...]] [--script SCRIPT]
[--docker] [--x86-only] [--migration] [--optimize]
[--full-iso]
[--remove-packages REMOVE_PACKAGES [REMOVE_PACKAGES ...]]
[--skip-usb-image] [--copy-dir COPY_DIRECTORY]
[--clear-bridging-fixes] [--verbose-dep-check] [--debug]
[--isoinfo ISOINFO] [--image-script IMAGE_SCRIPT]
[--version]
Utility to build Golden ISO for IOS-XR.
optional arguments:
-h, --help show this help message and exit
--iso ISO Path to Mini.iso/Full.iso file
--repo REPO [REPO ...]
Path to RPM repository. For LNT, user can specify
.rpm, .tgz, .tar filenames, or directories. RPMs are
only used if already included in the ISO, or specified
by the user via the --pkglist option.
--bridging-fixes BRIDGE_FIXES [BRIDGE_FIXES ...]
Bridging rpms to package. For EXR, takes from-release
or rpm names; for LNT, the user can specify the same
file types as for the --repo option.
--xrconfig XRCONFIG Path to XR config file
--ztp-ini ZTP_INI Path to user ztp ini file
--label LABEL, -l LABEL
Golden ISO Label
--no-label Indicates that no label at all should be added to the
GISO
--out-directory OUT_DIRECTORY
Output Directory
--create-checksum Write a file with the checksum and size of the output
file(s)
--yamlfile CLI_YAML Cli arguments via yaml
--clean Delete output dir before proceeding
--pkglist PKGLIST [PKGLIST ...]
Packages to be added to the output GISO. For eXR:
optional rpm or smu to package. For LNT: either full
package filenames or package names for user
installable packages can be specified. Full package
filenames can be specified to choose a particular
version of a package, the rest of the block that the
package is in will be included as well. Package names
can be specified to include optional packages in the
output GISO.
--docker, --use-container
Build GISO in container environment.Pulls and run pre-
built container image to build GISO.
--version Print version of this script and exit
EXR only build options:
--script SCRIPT Path to user executable script executed as part of
bootup post activate.
--x86-only Use only x86_64 rpms even if other architectures are
applicable.
--migration To build Migration tar only for ASR9k
--optimize Optimize GISO by recreating and resigning initrd
--full-iso To build full iso only for xrv9k
LNT only build options:
--remove-packages REMOVE_PACKAGES [REMOVE_PACKAGES ...]
Remove RPMs, specified in a space separated list.
These are matched against user installable package
names, and must be the whole package name, e.g: xr-bgp
--skip-usb-image Do not build the USB image
--copy-dir COPY_DIRECTORY
Copy built artefacts to specified directory if
provided. The specified directory must already exist,
be writable by the builder and must not contain a
previously built artefact with the same name.
--clear-bridging-fixes
Remove all bridging bugfixes from the input ISO
--verbose-dep-check Verbose output for the dependency check.
--debug Output debug logs to console
--isoinfo ISOINFO User specified isoinfo executable to use instead of
the default version
--image-script IMAGE_SCRIPT
User specified image.py script to be used for
packing/unpacking instead of the version extracted
from the ISO. It will not be inserted into the GISO.
Intended for debugging purposes only.
Disclaimer: I am long in CSCO
